/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.it.aggregation;

import org.apache.iotdb.it.env.EnvFactory;
import org.apache.iotdb.it.framework.IoTDBTestRunner;
import org.apache.iotdb.itbase.category.ClusterIT;
import org.apache.iotdb.itbase.category.LocalStandaloneIT;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Locale;

import static org.apache.iotdb.db.constant.TestConstant.*;
import static org.apache.iotdb.db.it.utils.TestUtils.resultSetEqualWithDescOrderTest;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.fail;

@RunWith(IoTDBTestRunner.class)
@Category({LocalStandaloneIT.class, ClusterIT.class})
public class IoTDBAggregationIT {

    private static final double DETLA = 1e-6;
    private static final String TIMESTAMP_STR = "Time";
    private static final String TEMPERATURE_STR = "root.ln.wf01.wt01.temperature";

    private static final String[] creationSqls =
            new String[]{
                    "CREATE DATABASE root.vehicle.d0",
                    "CREATE DATABASE root.vehicle.d1",
                    "CREATE TIMESERIES root.vehicle.d0.s0 WITH DATATYPE=INT32, ENCODING=RLE",
                    "CREATE TIMESERIES root.vehicle.d0.s1 WITH DATATYPE=INT64, ENCODING=RLE",
                    "CREATE TIMESERIES root.vehicle.d0.s2 WITH DATATYPE=FLOAT, ENCODING=RLE",
                    "CREATE TIMESERIES root.vehicle.d0.s3 WITH DATATYPE=TEXT, ENCODING=PLAIN",
                    "CREATE TIMESERIES root.vehicle.d0.s4 WITH DATATYPE=BOOLEAN, ENCODING=PLAIN",
                    "CREATE TIMESERIES root.test.noDataRegion.s1 WITH DATATYPE=INT32"
            };
    private static final String[] dataSet2 =
            new String[]{
                    "CREATE DATABASE root.ln.wf01.wt01",
                    "CREATE TIMESERIES root.ln.wf01.wt01.status WITH DATATYPE=BOOLEAN, ENCODING=PLAIN",
                    "CREATE TIMESERIES root.ln.wf01.wt01.temperature WITH DATATYPE=FLOAT, ENCODING=PLAIN",
                    "CREATE TIMESERIES root.ln.wf01.wt01.hardware WITH DATATYPE=INT32, ENCODING=PLAIN",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(1, 1.1, false, 11)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(2, 2.2, true, 22)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(3, 3.3, false, 33 )",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(4, 4.4, false, 44)",
                    "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
                            + "values(5, 5.5, false, 55)"
            };
    private static final String[] dataSet3 =
            new String[]{
                    "CREATE DATABASE root.sg",
                    "CREATE TIMESERIES root.sg.d1.s1 WITH DATATYPE=INT32, ENCODING=RLE",
                    "insert into root.sg.d1(timestamp,s1) values(5,5)",
                    "insert into root.sg.d1(timestamp,s1) values(12,12)",
                    "flush",
                    "insert into root.sg.d1(timestamp,s1) values(15,15)",
                    "insert into root.sg.d1(timestamp,s1) values(25,25)",
                    "flush",
                    "insert into root.sg.d1(timestamp,s1) values(1,111)",
                    "insert into root.sg.d1(timestamp,s1) values(20,200)",
                    "flush",
            };
    private final String d0s0 = "root.vehicle.d0.s0";
    private final String d0s1 = "root.vehicle.d0.s1";
    private final String d0s2 = "root.vehicle.d0.s2";
    private final String d0s3 = "root.vehicle.d0.s3";
    private static final String insertTemplate =
            "INSERT INTO root.vehicle.d0(timestamp,s0,s1,s2,s3,s4)" + " VALUES(%d,%d,%d,%f,%s,%s)";
    private static long prevPartitionInterval;

    @BeforeClass
    public static void setUp() throws Exception {
        EnvFactory.getEnv().initBeforeClass();
        prepareData();
    }

    @AfterClass
    public static void tearDown() throws Exception {
        EnvFactory.getEnv().cleanAfterClass();
    }

    // add test for part of points in page don't satisfy filter
    // details in: https://issues.apache.org/jira/projects/IOTDB/issues/IOTDB-54
    @Test
    public void test() {
        String[] retArray = new String[]{"0,2", "0,4", "0,3"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            int cnt;
            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT count(temperature) FROM root.ln.wf01.wt01 WHERE time > 3")) {
                cnt = 0;
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(count(TEMPERATURE_STR));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT count(temperature) FROM root.ln.wf01.wt01 WHERE time > 3 order by time desc")) {
                cnt = 0;
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(count(TEMPERATURE_STR));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT min_time(temperature) FROM root.ln.wf01.wt01 WHERE time > 3")) {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(minTime(TEMPERATURE_STR));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(2, cnt);
            }

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT min_time(temperature) FROM root.ln.wf01.wt01 WHERE temperature > 3")) {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(minTime(TEMPERATURE_STR));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(3, cnt);
            }

            try {
                statement.executeQuery("SELECT max(root.temperature) from root.ln.wf01.wt01");
                fail();
            } catch (Exception ignored) {
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void countTest() {
        String[] retArray = new String[]{"0,2001,2001,2001,2001", "0,7500,7500,7500,7500"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            int cnt;
            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT count(s0),count(s1),count(s2),count(s3) "
                                         + "FROM root.vehicle.d0 WHERE time >= 6000 AND time <= 9000")) {
                cnt = 0;
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(count(d0s0))
                                    + ","
                                    + resultSet.getString(count(d0s1))
                                    + ","
                                    + resultSet.getString(count(d0s2))
                                    + ","
                                    + resultSet.getString(count(d0s3));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT count(s0),count(s1),count(s2),count(s3) " + "FROM root.vehicle.d0")) {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(count(d0s0))
                                    + ","
                                    + resultSet.getString(count(d0s1))
                                    + ","
                                    + resultSet.getString(count(d0s2))
                                    + ","
                                    + resultSet.getString(count(d0s3));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(2, cnt);
            }

            // keep the correctness of `order by time desc`
            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT count(s0),count(s1),count(s2),count(s3) "
                                         + "FROM root.vehicle.d0 WHERE time >= 6000 AND time <= 9000 order by time desc")) {
                cnt = 0;
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(count(d0s0))
                                    + ","
                                    + resultSet.getString(count(d0s1))
                                    + ","
                                    + resultSet.getString(count(d0s2))
                                    + ","
                                    + resultSet.getString(count(d0s3));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT count(s0),count(s1),count(s2),count(s3) "
                                         + "FROM root.vehicle.d0 order by time desc")) {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(count(d0s0))
                                    + ","
                                    + resultSet.getString(count(d0s1))
                                    + ","
                                    + resultSet.getString(count(d0s2))
                                    + ","
                                    + resultSet.getString(count(d0s3));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(2, cnt);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void firstTest() {
        String[] retArray = new String[]{"0,2000,2000,2000.0,2000", "0,500,500,500.0,500"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            int cnt;
            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT first_value(s0),first_value(s1),first_value(s2),first_value(s3) "
                                         + "FROM root.vehicle.d0 WHERE time >= 1500 AND time <= 9000")) {
                cnt = 0;
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(firstValue(d0s0))
                                    + ","
                                    + resultSet.getString(firstValue(d0s1))
                                    + ","
                                    + resultSet.getString(firstValue(d0s2))
                                    + ","
                                    + resultSet.getString(firstValue(d0s3));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT first_value(s0),first_value(s1),first_value(s2),first_value(s3) "
                                         + "FROM root.vehicle.d0")) {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(firstValue(d0s0))
                                    + ","
                                    + resultSet.getString(firstValue(d0s1))
                                    + ","
                                    + resultSet.getString(firstValue(d0s2))
                                    + ","
                                    + resultSet.getString(firstValue(d0s3));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(2, cnt);
            }

            // keep the correctness of `order by time desc`
            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT first_value(s0),first_value(s1),first_value(s2),first_value(s3) "
                                         + "FROM root.vehicle.d0 WHERE time >= 1500 AND time <= 9000 order by time desc")) {
                cnt = 0;
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(firstValue(d0s0))
                                    + ","
                                    + resultSet.getString(firstValue(d0s1))
                                    + ","
                                    + resultSet.getString(firstValue(d0s2))
                                    + ","
                                    + resultSet.getString(firstValue(d0s3));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void lastTest() {
        String[] retArray = new String[]{"0,8499,8499.0", "0,1499,1499.0", "0,2200,2200.0"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            int cnt;
            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT last_value(s0),last_value(s2) "
                                         + "FROM root.vehicle.d0 WHERE time >= 1500 AND time < 9000")) {
                cnt = 0;
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(lastValue(d0s0))
                                    + ","
                                    + resultSet.getString(lastValue(d0s2));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT last_value(s0),last_value(s2) "
                                         + "FROM root.vehicle.d0 WHERE time <= 1600")) {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(lastValue(d0s0))
                                    + ","
                                    + resultSet.getString(lastValue(d0s2));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(2, cnt);
            }

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT last_value(s0),last_value(s2) "
                                         + "FROM root.vehicle.d0 WHERE time <= 2200")) {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(lastValue(d0s0))
                                    + ","
                                    + resultSet.getString(lastValue(d0s2));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(3, cnt);
            }

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT last_value(s0),last_value(s2) "
                                         + "FROM root.vehicle.d0 WHERE time <= 2200 order by time desc")) {
                cnt = 0;
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(lastValue(d0s0))
                                    + ","
                                    + resultSet.getString(lastValue(d0s2));
                    Assert.assertEquals(retArray[retArray.length - cnt - 1], ans);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }

            // keep the correctness of `order by time desc`
            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT last_value(s0),last_value(s2) "
                                         + "FROM root.vehicle.d0 WHERE time >= 1500 AND time < 9000 order by time desc")) {
                cnt = 0;
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(lastValue(d0s0))
                                    + ","
                                    + resultSet.getString(lastValue(d0s2));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void maxminTimeTest() {
        String[] retArray = new String[]{"0,8499,500", "0,2499,2000"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            int cnt;
            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT max_time(s0),min_time(s2) "
                                         + "FROM root.vehicle.d0 WHERE time >= 100 AND time < 9000")) {
                cnt = 0;
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(maxTime(d0s0))
                                    + ","
                                    + resultSet.getString(minTime(d0s2));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT max_time(s0),min_time(s2) "
                                         + "FROM root.vehicle.d0 WHERE time <= 2500 AND time > 1800")) {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(maxTime(d0s0))
                                    + ","
                                    + resultSet.getString(minTime(d0s2));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(2, cnt);
            }

            // keep the correctness of `order by time desc`
            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT max_time(s0),min_time(s2) "
                                         + "FROM root.vehicle.d0 WHERE time >= 100 AND time < 9000 order by time desc")) {
                cnt = 0;
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(maxTime(d0s0))
                                    + ","
                                    + resultSet.getString(minTime(d0s2));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void firstLastValueTest() throws SQLException {
        String[] retArray =
                new String[]{
                        "0,2.2,4.4",
                };
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            int cnt;
            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT first_value(temperature),last_value(temperature) "
                                         + "FROM root.ln.wf01.wt01 WHERE time > 1 AND time < 5")) {
                cnt = 0;
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(1)
                                    + ","
                                    + resultSet.getString(2);
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }
        }
    }

    @Test
    public void maxminValueTest() {
        String[] retArray = new String[]{"0,8499,500.0", "0,2499,500.0"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            int cnt;
            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT max_value(s0),min_value(s2) "
                                         + "FROM root.vehicle.d0 WHERE time >= 100 AND time < 9000")) {
                cnt = 0;
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(maxValue(d0s0))
                                    + ","
                                    + resultSet.getString(minValue(d0s2));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT max_value(s0),min_value(s2) " + "FROM root.vehicle.d0 WHERE time < 2500")) {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(maxValue(d0s0))
                                    + ","
                                    + resultSet.getString(minValue(d0s2));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(2, cnt);
            }

            // keep the correctness of `order by time desc`
            cnt = 0;
            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT max_value(s0),min_value(s2) "
                                         + "FROM root.vehicle.d0 WHERE time >= 100 AND time < 9000 order by time desc")) {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(maxValue(d0s0))
                                    + ","
                                    + resultSet.getString(minValue(d0s2));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void avgSumTest() {
        double[][] retArray = {
                {0.0, 1.4508E7, 7250.374812593702},
                {0.0, 626750.0, 1250.9980039920158}
        };

        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            int cnt = 0;
            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT sum(s0),avg(s2)"
                                         + "FROM root.vehicle.d0 WHERE time >= 6000 AND time <= 9000")) {
                while (resultSet.next()) {
                    double[] ans = new double[3];
                    ans[0] = Double.parseDouble(resultSet.getString(TIMESTAMP_STR));
                    ans[1] = Double.parseDouble(resultSet.getString(sum(d0s0)));
                    ans[2] = Double.parseDouble(resultSet.getString(avg(d0s2)));
                    assertArrayEquals(retArray[cnt], ans, DETLA);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT sum(s0),avg(s2)"
                                         + "FROM root.vehicle.d0 WHERE time >= 1000 AND time <= 2000")) {
                while (resultSet.next()) {
                    double[] ans = new double[3];
                    ans[0] = Double.parseDouble(resultSet.getString(TIMESTAMP_STR));
                    ans[1] = Double.parseDouble(resultSet.getString(sum(d0s0)));
                    ans[2] = Double.parseDouble(resultSet.getString(avg(d0s2)));
                    assertArrayEquals(retArray[cnt], ans, DETLA);
                    cnt++;
                }
                Assert.assertEquals(2, cnt);
            }

            // keep the correctness of `order by time desc`
            cnt = 0;
            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT sum(s0),avg(s2)"
                                         + "FROM root.vehicle.d0 WHERE time >= 6000 AND time <= 9000 order by time desc")) {
                while (resultSet.next()) {
                    double[] ans = new double[3];
                    ans[0] = Double.parseDouble(resultSet.getString(TIMESTAMP_STR));
                    ans[1] = Double.parseDouble(resultSet.getString(sum(d0s0)));
                    ans[2] = Double.parseDouble(resultSet.getString(avg(d0s2)));
                    assertArrayEquals(retArray[cnt], ans, DETLA);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void avgSumErrorTest() {
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            try {
                try (ResultSet resultSet =
                             statement.executeQuery(
                                     "SELECT avg(s3) FROM root.vehicle.d0 WHERE time >= 6000 AND time <= 9000")) {
                    resultSet.next();
                    fail();
                }
            } catch (Exception e) {
                Assert.assertTrue(
                        e.getMessage(),
                        e.getMessage()
                                .contains(
                                        "Aggregate functions [AVG, SUM, EXTREME, MIN_VALUE, MAX_VALUE] only support numeric data types [INT32, INT64, FLOAT, DOUBLE]"));
            }
            try {
                try (ResultSet resultSet =
                             statement.executeQuery(
                                     "SELECT sum(s3)" + "FROM root.vehicle.d0 WHERE time >= 6000 AND time <= 9000")) {
                    resultSet.next();
                    fail();
                }
            } catch (Exception e) {
                Assert.assertTrue(
                        e.getMessage()
                                .contains(
                                        "Aggregate functions [AVG, SUM, EXTREME, MIN_VALUE, MAX_VALUE] only support numeric data types [INT32, INT64, FLOAT, DOUBLE]"));
            }
            try {
                try (ResultSet resultSet =
                             statement.executeQuery(
                                     "SELECT avg(s4)" + "FROM root.vehicle.d0 WHERE time >= 6000 AND time <= 9000")) {
                    resultSet.next();
                    fail();
                }
            } catch (Exception e) {
                Assert.assertTrue(
                        e.getMessage()
                                .contains(
                                        "Aggregate functions [AVG, SUM, EXTREME, MIN_VALUE, MAX_VALUE] only support numeric data types [INT32, INT64, FLOAT, DOUBLE]"));
            }
            try {
                try (ResultSet resultSet =
                             statement.executeQuery(
                                     "SELECT sum(s4)" + "FROM root.vehicle.d0 WHERE time >= 6000 AND time <= 9000")) {
                    resultSet.next();
                    fail();
                }
            } catch (Exception e) {
                Assert.assertTrue(
                        e.getMessage(),
                        e.getMessage()
                                .contains(
                                        "Aggregate functions [AVG, SUM, EXTREME, MIN_VALUE, MAX_VALUE] only support numeric data types [INT32, INT64, FLOAT, DOUBLE]"));
            }
            try {
                try (ResultSet resultSet =
                             statement.executeQuery("SELECT avg(status) FROM root.ln.wf01.wt01")) {
                    resultSet.next();
                    fail();
                }
            } catch (Exception e) {
                Assert.assertTrue(
                        e.getMessage(),
                        e.getMessage()
                                .contains(
                                        "Aggregate functions [AVG, SUM, EXTREME, MIN_VALUE, MAX_VALUE] only support numeric data types [INT32, INT64, FLOAT, DOUBLE]"));
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    /**
     * test aggregation query with more than one functions on one series
     */
    @Test
    public void mergeAggrOnOneSeriesTest() {
        double[][] retArray = {
                {0.0, 1.4508E7, 7250.374812593702, 7250.374812593702, 1.4508E7},
                {0.0, 626750.0, 1250.9980039920158, 1250.9980039920158, 626750.0},
                {0.0, 1.4508E7, 2001, 7250.374812593702, 7250.374812593702},
                {0.0, 1.4508E7, 2001, 7250.374812593702, 7250.374812593702, 2001, 1.4508E7}
        };

        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            int cnt = 0;
            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT sum(s0), avg(s2), avg(s0), sum(s2)"
                                         + "FROM root.vehicle.d0 WHERE time >= 6000 AND time <= 9000")) {
                while (resultSet.next()) {
                    double[] ans = new double[5];
                    ans[0] = Double.parseDouble(resultSet.getString(TIMESTAMP_STR));
                    ans[1] = Double.parseDouble(resultSet.getString(sum(d0s0)));
                    ans[2] = Double.parseDouble(resultSet.getString(avg(d0s2)));
                    ans[3] = Double.parseDouble(resultSet.getString(avg(d0s0)));
                    ans[4] = Double.parseDouble(resultSet.getString(sum(d0s2)));
                    assertArrayEquals(retArray[cnt], ans, DETLA);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT sum(s0), avg(s2), avg(s0), sum(s2)"
                                         + "FROM root.vehicle.d0 WHERE time >= 1000 AND time <= 2000")) {
                while (resultSet.next()) {
                    double[] ans = new double[5];
                    ans[0] = Double.parseDouble(resultSet.getString(TIMESTAMP_STR));
                    ans[1] = Double.parseDouble(resultSet.getString(sum(d0s0)));
                    ans[2] = Double.parseDouble(resultSet.getString(avg(d0s2)));
                    ans[3] = Double.parseDouble(resultSet.getString(avg(d0s0)));
                    ans[4] = Double.parseDouble(resultSet.getString(sum(d0s2)));
                    assertArrayEquals(retArray[cnt], ans, DETLA);
                    cnt++;
                }
                Assert.assertEquals(2, cnt);
            }

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT sum(s0), count(s0), avg(s2), avg(s0)"
                                         + "FROM root.vehicle.d0 WHERE time >= 6000 AND time <= 9000")) {
                while (resultSet.next()) {
                    double[] ans = new double[5];
                    ans[0] = Double.parseDouble(resultSet.getString(TIMESTAMP_STR));
                    ans[1] = Double.parseDouble(resultSet.getString(sum(d0s0)));
                    ans[2] = Double.parseDouble(resultSet.getString(count(d0s0)));
                    ans[3] = Double.parseDouble(resultSet.getString(avg(d0s2)));
                    ans[4] = Double.parseDouble(resultSet.getString(avg(d0s0)));
                    assertArrayEquals(retArray[cnt], ans, DETLA);
                    cnt++;
                }
                Assert.assertEquals(3, cnt);
            }

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "SELECT sum(s2), count(s0), avg(s2), avg(s1), count(s2),sum(s0)"
                                         + "FROM root.vehicle.d0 WHERE time >= 6000 AND time <= 9000")) {
                while (resultSet.next()) {
                    double[] ans = new double[7];
                    ans[0] = Double.parseDouble(resultSet.getString(TIMESTAMP_STR));
                    ans[1] = Double.parseDouble(resultSet.getString(sum(d0s2)));
                    ans[2] = Double.parseDouble(resultSet.getString(count(d0s0)));
                    ans[3] = Double.parseDouble(resultSet.getString(avg(d0s2)));
                    ans[4] = Double.parseDouble(resultSet.getString(avg(d0s1)));
                    ans[5] = Double.parseDouble(resultSet.getString(count(d0s2)));
                    ans[6] = Double.parseDouble(resultSet.getString(sum(d0s0)));
                    assertArrayEquals(retArray[cnt], ans, DETLA);
                    cnt++;
                }
                Assert.assertEquals(4, cnt);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void descAggregationWithUnseqData() {
        String[] retArray =
                new String[]{
                        "0,12",
                };
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            int cnt = 0;
            try (ResultSet resultSet =
                         statement.executeQuery("SELECT max_time(s1) FROM root.sg.d1 where time < 15")) {
                while (resultSet.next()) {
                    String ans =
                            resultSet.getString(TIMESTAMP_STR)
                                    + ","
                                    + resultSet.getString(maxTime("root.sg.d1.s1"));
                    Assert.assertEquals(retArray[cnt], ans);
                    cnt++;
                }
                Assert.assertEquals(1, cnt);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    private static void prepareData() {
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            for (String sql : creationSqls) {
                statement.execute(sql);
            }

            // prepare BufferWrite file
            for (int i = 5000; i < 7000; i++) {
                statement.addBatch(
                        String.format(
                                Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "true"));
            }
            statement.executeBatch();
            statement.clearBatch();
            statement.execute("flush");

            for (int i = 7500; i < 8500; i++) {
                statement.addBatch(
                        String.format(
                                Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "false"));
            }
            statement.executeBatch();
            statement.clearBatch();
            statement.execute("flush");
            // prepare Unseq-File
            for (int i = 500; i < 1500; i++) {
                statement.addBatch(
                        String.format(
                                Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "true"));
            }
            statement.executeBatch();
            statement.clearBatch();
            statement.execute("flush");
            for (int i = 3000; i < 6500; i++) {
                statement.addBatch(
                        String.format(
                                Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "false"));
            }
            statement.executeBatch();
            statement.clearBatch();

            // prepare BufferWrite cache
            for (int i = 9000; i < 10000; i++) {
                statement.addBatch(
                        String.format(
                                Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "true"));
            }
            statement.executeBatch();
            statement.clearBatch();
            // prepare Overflow cache
            for (int i = 2000; i < 2500; i++) {
                statement.addBatch(
                        String.format(
                                Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "false"));
            }
            statement.executeBatch();
            statement.clearBatch();

            for (String sql : dataSet3) {
                statement.execute(sql);
            }

            for (String sql : dataSet2) {
                statement.execute(sql);
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void noDataRegionTest() {
        String[] expectedHeader =
                new String[]{count("root.test.noDataRegion.s1"), sum("root.test.noDataRegion.s1")};
        String[] retArray = new String[]{"0,null,"};
        resultSetEqualWithDescOrderTest(
                "select count(s1), sum(s1) from root.test.noDataRegion", expectedHeader, retArray);
    }
}
